Town of Mt. Pleasant Water District #3 Dam

ROCKEFELLER BROOK· Westchester, New York· Built 1915· Earth· 7 ft tall
Significant Hazard Water Supply Local Government

Key Takeaway

Town of Mt. Pleasant Water District #3 Dam is classified as significant hazard in New York. It was completed in 1915 and is 111 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 7 ft (taller than 0.9% in NY)
Dam Length300 ft
Dam TypeEarth
Max Storage10 acre-ft
Normal Storage6 acre-ft
Surface Area2 acres
Max Discharge30 cfs
Year Completed1915 (111 years old)
NID IDNY13602

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: August 3, 2018
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

TOWN OF MT PLEASANT

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Town of Mt. Pleasant Water District #3 Dam?

Town of Mt. Pleasant Water District #3 Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Town of Mt. Pleasant Water District #3 Dam?

Town of Mt. Pleasant Water District #3 Dam is owned by TOWN OF MT PLEASANT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Town of Mt. Pleasant Water District #3 Dam built?

Town of Mt. Pleasant Water District #3 Dam was completed in 1915, making it 111 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Town of Mt. Pleasant Water District #3 Dam?

Town of Mt. Pleasant Water District #3 Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Town of Mt. Pleasant Water District #3 Dam?

Town of Mt. Pleasant Water District #3 Dam has a dam height of 7 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Town of Mt. Pleasant Water District #3 Dam last inspected?

Town of Mt. Pleasant Water District #3 Dam was last inspected on August 3, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.